Beverage container coaster



FIG. 1 is a top plan view of a beverage container coaster showing my new design, the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a right side elevation view thereof.

The undisclosed bottom view is unornamented. 

The ornamental design for a beverage container coaster, as shown and described. 